WVGSA Grade 5 Science Practice Questions - West Virginia General Summative Assessment Grade 5 Science Exam

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Students set up sealed test tubes containing water and bromothymol blue (a pH indicator that turns yellow in high carbon dioxide and blue in low carbon dioxide): - Tube 1: Contains an Elodea water plant placed under bright light. - Tube 2: Contains a freshwater snail placed in the dark. After 4 hours, Tube 1 turns deep blue while Tube 2 turns bright yellow. Why?

The plant absorbed carbon dioxide during photosynthesis, while the snail released carbon dioxide during cellular respiration. The plant produced carbon dioxide, while the snail absorbed carbon dioxide. The snail ate the plant through the glass tube. The plant released oxygen that turned the indicator yellow.

Correct Answer:

The plant absorbed carbon dioxide during photosynthesis, while the snail released carbon dioxide during cellular respiration.

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